From sedentary time to sedentary patterns: accelerometer data reduction decisions in youth.
From sedentary time to sedentary patterns: accelerometer data reduction decisions in youth.
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DOI：
10.1371/journal.pone.0111205
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发表时间：
2014
期刊：
影响因子：
3.7
通讯作者：
Altenburg TM
中科院分区：
文献类型：
--
作者：
Chinapaw MJ;de Niet M;Verloigne M;De Bourdeaudhuij I;Brug J;Altenburg TM
本研究旨在建立基于证据的加速度计数据简化标准，以准确评估儿童的总久坐时间和久坐模式。参与者（n = 1057名欧洲儿童; 9-13岁）被邀请佩戴加速度计至少连续6天。 我们探索了1）非佩戴时间标准; 2）每日最短有效佩戴时间; 3）工作日和周末之间的差异;以及4）通过比较常用数据减少决策对总久坐时间以及长时间久坐发作的持续时间和次数的影响来确定佩戴加速计的最短天数。连续60分钟以上的零计数是非磨损时间的最佳标准。将有效日的定义从8小时增加到10小时佩戴时间几乎没有影响久坐的结果，而有效日超过4天的儿童的样本量从69%增加到81%。在工作日，孩子们平均多穿1小时的衣服，多坐50分钟的总时间，多坐26分钟的时间积累在回合，多坐一回合。至少需要6天的加速度计数据才能准确表示每周的久坐时间和模式。根据我们的研究结果，我们建议1）最少60分钟的连续零作为非佩戴时间的最现实标准; 2）包括至少六天，至少八个有效小时，以表征儿童通常的总久坐时间和模式，最好包括一个周末。
This study aims to establish evidence-based accelerometer data reduction criteria to accurately assess total sedentary time and sedentary patterns in children. Participants (n = 1057 European children; 9–13 yrs) were invited to wear an accelerometer for at least 6 consecutive days. We explored 1) non-wear time criteria; 2) minimum daily valid wear time; 3) differences between weekday and weekend day; and 4) minimum number of days of accelerometer wear by comparing the effects of commonly used data reduction decisions on total sedentary time, and duration and number of prolonged sedentary bouts. More than 60 consecutive minutes of zero counts was the optimal criterion for non-wear time. Increasing the definition of a valid day from 8 to 10 hours wear time hardly influenced the sedentary outcomes, while the sample size of children with more than 4 valid days increased from 69 to 81%. On weekdays, children had on average 1 hour more wear time, 50 minutes more total sedentary time, 26 minutes more sedentary time accumulated in bouts, and 1 more sedentary bout. At least 6 days of accelerometer data were needed to accurately represent weekly sedentary time and patterns. Based on our results we recommend 1) a minimum of 60 minutes of consecutive zeros as the most realistic criterion for non-wear time; and 2) including at least six days with minimum eight valid hours to characterize children's usual total sedentary time and patterns, preferably including one weekend day.
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影响因子：
3.7
作者：
Saunders TJ;Tremblay MS;Mathieu MÈ;Henderson M;O'Loughlin J;Tremblay A;Chaput JP;QUALITY cohort research group
通讯作者：
QUALITY cohort research group
DOI：
10.1186/1479-5868-8-120
发表时间：
2011-10-28
期刊：
The international journal of behavioral nutrition and physical activity
影响因子：
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作者：
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通讯作者：
Donnelly AE
影响因子：
16.2
作者：
Dunstan DW;Kingwell BA;Larsen R;Healy GN;Cerin E;Hamilton MT;Shaw JE;Bertovic DA;Zimmet PZ;Salmon J;Owen N
通讯作者：
Owen N
DOI：
10.1249/01.mss.0000185657.86065.98
发表时间：
2005-11-01
期刊：
MEDICINE AND SCIENCE IN SPORTS AND EXERCISE
影响因子：
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作者：
Trost, SG;McIver, KL;Pate, RR
通讯作者：
Pate, RR
DOI：
10.1186/1479-5868-10-140
发表时间：
2013-12-23
影响因子：
8.7
作者：
Toftager, Mette;Kristensen, Peter Lund;Troelsen, Jens
通讯作者：
Troelsen, Jens